fix: 修复配额说明重复和undefined问题

- 在editStorageForm中初始化oss_storage_quota_value和oss_quota_unit
- 删除重复的旧配额说明块，保留新的当前配额设置显示

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/node_modules/@smithy/eventstream-serde-universal/README.md

@@ -0,0 +1,10 @@
+# @smithy/eventstream-serde-universal
+
+[![NPM version](https://img.shields.io/npm/v/@smithy/eventstream-serde-universal/latest.svg)](https://www.npmjs.com/package/@smithy/eventstream-serde-universal)
+[![NPM downloads](https://img.shields.io/npm/dm/@smithy/eventstream-serde-universal.svg)](https://www.npmjs.com/package/@smithy/eventstream-serde-universal)
+
+> An internal package
+
+## Usage
+
+You probably shouldn't, at least directly.